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Ocean Science An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/os-2017-82
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
24 Oct 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Ocean Science (OS).
Rising bubbles as mechanism for scavenging and aerosolization of diatoms
Roman Marks1, Ewa Górecka2, Kevin Mc Cartney3, and Wojciech Borkowski1 1University of Szczecin, Faculty of Geosciences, Physical Oceanography Unit, Mickiewicza 16, 70-383 Szczecin, Poland
2Natural Sciences Education and Research Centre, University of Szczecin, Palaeoceanology Unit, Mickiewicza 16a, 70-383 Szczecin, Poland
3Department of Environmental Sciences and Sustainability, University of Maine at Presque Isle, Presque Isle, ME 04769, USA
Abstract. Bubbles rising in clean saline water cause steady displacement of ions at the bubble boundaries that separate anions and cations based on ion mass. Anions of greater mass are resistant to displacement and concentrate on the bubble upper half sphere, while smaller and less massive cations are displaced towards lower pressure of the bottom half sphere. The separation into anionic and cationic domains on the bubble curvatures creates electric polarity that may draw particulates dispersed in the water. Viable diatoms as well as bacteria develop negative charge on outer membranes, that are attracted to the cationic bubble bottom half sphere and pocket. When bubble bursts at the air/water interface the diatoms and bacteria are ejected into the air with initial or secondary jet droplets that are projected upward with a small water column derived from a cationic vortex. Experiments conducted in brackish and oceanic saline water on Nanofrustulum and Cyclotella cells indicated that the averaged concentration in jet droplets compared to the original water volume (here termed the enrichment factor) for aerosolized diatoms may range from 8 to 307.

Citation: Marks, R., Górecka, E., Mc Cartney, K., and Borkowski, W.: Rising bubbles as mechanism for scavenging and aerosolization of diatoms, Ocean Sci. Discuss., https://doi.org/10.5194/os-2017-82, in review, 2017.
Roman Marks et al.
Roman Marks et al.
Roman Marks et al.

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Short summary
Experiments indicated that cation-mediated electrostriction plays a principal role in bubble vorticity and related attraction/scavenge of bacteria and diatoms by rising bubbles in saline water. The mechanism is important for global matter cycling and related process of matter accumulation near the ocean surface. Massive and long-term bubble-cationic-rotational processing of matter in the oceanic water and in droplets suspended in air may likely incepted the bio-matter evolution on the Earth.
Experiments indicated that cation-mediated electrostriction plays a principal role in bubble...
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